Hobart Welding Products 1800 Replacing Gun Contact Tip, Changing Drive Roll And Wire Inlet Guide

4-5. Replacing Gun Contact Tip

Tools Needed:

2

1

YTurn Off unit.

1Nozzle

2Contact Tip

Cut off welding wire at contact tip. Remove nozzle.

Remove contact tip and install new contact tip. Reinstall nozzle.

Ref. 800 797-C

4-6. Changing Drive Roll And Wire Inlet Guide

		1	Inlet Wire Guide Securing
			Screw
		2	Inlet Wire Guide
		Loosen screw. Slide tip as close to
		drive rolls as possible without
		touching. Tighten screw.
		3	Drive Roll
3		Install correct drive roll for wire size
2		and type.
	4	4	Drive Roll Securing Screw
		Secure drive roll with screw as
		shown.

Tools Needed:

1

Ref. ST-801 875

4-7. Welding Troubleshooting Table

	Welding Trouble		Remedy
No weld output; wire does not feed.		Secure power cord plug in receptacle (see Section 2-10).
		Check and replace power switch if necessary.
		Check circuit breakers CB1 and/or CB2, and reset if necessary (see Section 4-2).
		Replace building line fuse or reset circuit breaker if open (see Section 2-10).
		Secure gun plug in receptacle or repair leads, or replace trigger switch (see Sections 2-4 and 4-4).
		Thermostat TP1 open (overheating). Allow fan to run; the thermostat will close when the unit has cooled
		(see Section 2-2).
No weld output; wire feeds.		Connect work clamp to get good metal to metal contact.
		Replace contact tip (see Section 4-5).
Low weld output.		Connect unit to proper input voltage or check for low line voltage (see Section 2-10).
Low, high, or erratic wire speed.		Readjust front panel settings (see Section 3-1).
		Change to correct size drive roll (see Section 4-6).
		Readjust drive roll pressure (see Section 2-11).
		Replace inlet guide, contact tip, and/or liner if necessary (see Section 4-6).

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